Question

Write a Unix shell script that takes three integers and sorts them from largest to smallest. An example execution is as follows (assume the name of the script is shs): % shs 3 9 4 The order is: 9 4 3 % shs -1 0 3 The order is: 0 -1 -3

Answer 1

PROGRAM

# !/bin/bash
declare num=(3 9 4)
# This will print the array before sorting
echo "Original Numbers in array:"
for (( i=0; i<=2; i++ ))
do
echo ${num[$i]}
done
# Now lets do the Sorting of numbers
for (( i=0; i<=2; i++ ))
do
for (( j=$i; j<=2; j++ ))
do
if [ ${num[$j]} -gt ${num[$i]} ]; then #Just using a sorting technique with O(n^2)
t=${num[$i]}
num[$i]=${num[$j]}
num[$j]=$t
#swapping the array to get desired result
fi
done
done
# Printing the sorted array
echo -e "\nSorted Numbers in Descending Order
Order:"
for (( i=0; i <= 2; i++ ))
do
echo ${num[$i]}
done

OUTPUT OF THE PROGRAM

This is the running code..It may cause problem due to indentation because i have pasted here from my file.....HOPE YOU WILL FIND THIS HELPFUL... if you have any queries regarding this let me know.